The PXD000001 files are part of the first ProteomeXchange submission (Vizcaíno J.A. et al, 2014), and contain the following files.
TMT_Erwinia_1uLSike_Top10HCD_isol2_45stepped_60min_01-20141210.mzML.gz: an TMT6 6-plex LC-MSMS data containing 6 human spiked-in proteins in a constant Erwinia carotovora protein backgroud. The data is described in more details in Gatto and Christoforou (2013).
TMT_Erwinia_1uLSike_Top10HCD_isol2_45stepped_60min_01-20141210.mzid: generated searching the raw data against the Erwinia carotovora fasta database
Vizcaíno J.A. et al. ProteomeXchange: globally co-ordinated proteomics data submission and dissemination, Nature Biotechnology 2014, 32, 223–226. http://www.ncbi.nlm.nih.gov/pubmed/24727771
Gatto L. and Christoforou A. Using R and Bioconductor for proteomics data analysis, Biochim Biophys Acta - Proteins and Proteomics, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23692960
The rpx package can be used to access and download any PRIDE/ProteomeXchange files.